Preparations for Use
–
CIRAS-2 Operator's Manual Version 2.04
- 23 -
CIRAS-2 uses default COM ports which may have been previously assigned to other devices used with
your computer. On your computer look in Windows Device Manager to determine to which Com Port your
USB device has been assigned: (description below based on Windows XP)
From the Windows Start Menu open Control Panel
– click on the System icon (may be under Performance
and Maintenance)
– on the System Properties box click the Hardware tab – click on Device Manager –
expand the Ports (COM & LPT) list by clicking the + button (see below). Note to which COM port your
device (USB to Serial Bridge) has been assigned for Step 10.
Step 8. Power on CIRAS-2
Switch on CIRAS-
2 by pressing the red “On/Off” button on the back panel. When powered, the switch
should illuminate bright red. The cuvette fans and CIRAS-
2‟s internal pumps should be running at this
point. You should also see the green LED flashing behind the water vapor equilibrator. Within 30
seconds the User Interface will become active and the UI remote control software (RCS) will load. RCS
will attempt to automatically set parameters and load default settings.
Whenever you operate CIRAS-2 through the integral UI (without RS232 connection to computer)
the RCS settings are relayed normally. If you are attempting to connect to CIRAS-2 with your
computer via the RS232 cable, you may see a Communications Error dialog box in the UI display
indicating that CIRAS-2 cannot simultaneously communicate with your PC
and
the integral UI.
When the Communications Error dialog appears:
